This detailed concept art of Kaecilius shows unusual markings around his eyes.
Here's Kaecilius in an alternate costume and plenty of purplish goo. Anyone else think he's standing on casino carpet?
This art shows the Zealots who follow Kaecilius inside a sanctum performing dark magic.
More key art shows the Zealots making magic happen.
This detailed concept art of Kaecilius shows an alternate costume and makeup design.
This concept art of Kaecilius shows an alternate costume and makeup design with an interesting twist on a martial arts outfit, and of course more purple makeup.
This Kaecilius outfit looks like it was almost made with magic threads. The alternative makeup also implies the eyes should have the most emphasis.
This alternate Kaecilius costume looks like it could easily double as an outfit perfect for a Jedi in training. On a side note, actor Mads Mikkelsen also starred in "Rogue One: A Star Wars Story."